Fenwal 35-665913-119 Ignition Module 15-Sec Pre-Purge 24V

The Fenwal 35-665913-119 Ignition Module is a unit of electrical control that is installed in gas-fired heating HVAC systems to control the sequence and burner start-up. With 24V operation, it gives a 15-second pre-purge interval to empty the combustion chambers of the remaining gases before igniting the spark or hot-surface. It is fitted in furnaces and boilers and communicates with switches, flame sensors, and gas valves to coordinate the combustion process. This module is the main logic unit of the entire system that promotes controlled heating operation.